Choosing the right lens material is essential for comfort, durability, and aesthetics. The three most common options—CR-39, polycarbonate, and high-index lenses—each have unique advantages. This guide compares them to help you make the best choice.

1. What Are CR-39, Polycarbonate, and High-Index Lenses?

• CR-39 Lenses: A type of plastic lens known for excellent optical clarity and affordability.

• Polycarbonate (PC) Lenses: A highly impact-resistant material that is thinner and lighter than CR-39.

• High-Index Lenses: Ultra-thin lenses designed for strong prescriptions, reducing thickness and weight.

2. Key Differences: CR-39 vs. Polycarbonate vs. High-Index Lenses

3. Pros & Cons of Each Lens Type

✔ CR-39 Lenses: Pros & Cons

✅ Best optical clarity—ideal for everyday wear.
✅ Most affordable—cheapest lens material.
❌ Thicker and heavier—not ideal for high prescriptions.
❌ Breaks more easily—not impact-resistant.

✔ Polycarbonate Lenses: Pros & Cons

✅ Impact-resistant—great for sports, kids, and safety glasses.
✅ Thinner & lighter than CR-39.
✅ 100% UV protection built-in.
❌ Slightly lower optical clarity than CR-39.
❌ More prone to scratches—requires anti-scratch coating.

✔ High-Index Lenses: Pros & Cons

✅ Thinnest and lightest lenses—perfect for strong prescriptions.
✅ 100% UV protection built-in.
✅ More scratch-resistant than polycarbonate.
❌ Most expensive option.
❌ Slightly more reflective—requires an anti-reflective coating.

4. Which Lens Material Should You Choose?

✅ Choose CR-39 Lenses if you have a mild prescription (-2.00 or lower) and want an affordable option with excellent clarity.
✅ Choose Polycarbonate Lenses if you need impact resistance, lightweight comfort, and built-in UV protection.
✅ Choose High-Index Lenses if you have a strong prescription (-4.00 or higher) and want the thinnest, lightest lenses for the best aesthetics.

Conclusion

Selecting the right lens material depends on your prescription strength, lifestyle, and budget. CR-39 is great for affordability and clarity, polycarbonate is best for durability, and high-index lenses offer the ultimate in thinness and style. Choose the one that meets your needs for the perfect pair of glasses!